Make compatible with Gradle 9

[ganadist]

Fix #309

Bytecode of plugin refer groovy.util.XmlSlurper, but this class is not accessible in Groovy 4 runtime.
Added import statement to use groovy.xml.XmlSlurper class which is available on Groovy 3 and 4 runtime.
ref :

• Gradle 8.14 : https://docs.gradle.org/8.14.2/userguide/compatibility.html#groovy
• Gradle 9.0.0 : https://docs.gradle.org/9.0.0-milestone-9/userguide/compatibility.html#groovy
  • Gradle 9 upgrade guide does not include changes in the Groovy util packages gradle/gradle#34168

• AS-IS

$ javap -c -cp oss-licenses-plugin-0.10.6.jar com.google.android.gms.oss.licenses.plugin.LicensesTask | grep XmlSlurper
     259: ldc_w         #488                // class groovy/util/XmlSlurper

• TO-BE

$ javap -c -cp oss-licenses-plugin-0.10.6.jar com.google.android.gms.oss.licenses.plugin.LicensesTask | grep XmlSlurper
     260: ldc_w         #488                // class groovy/xml/XmlSlurper

[heftisun]

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[boyloveman1992-droid]

paing.oomg@bk.ru